Thebraphic co



UNITED STATES PATENT Gurte.

J. J. OONLEY, OF NEV YORK, N. Y.

IMPROVEMENTBIN LATHES FOR TURNING SHAFTING.

To all whom it may concern:

Be it known that I, J. J. GoNL'EY, of the city, county, and State of New York, have invented certain new and useful Improvemen ts in Machines for Turning Shafting, andpI do hereby decla-re that the following is a full, clear, and exact description of the same, reference being had to the accompanying drawings, making a part of this specification, in which- Figure l is a central vertical longitudinal section. Fig. 2 is a vertical transverse section, taken in the line x of Fig. 1. Fig. 3 is a plan or top view. Fig. 4 is a detached perspective View of a portion of the invention. Fig. 5 is a detached longitudinal section of the said portion.

Similar letters of reference indicate correspending parts in all the figures.

This invention consists in a novel construction of a machine for turning shaftin g, whereby the shaftin g may be turned much more quickly' and with less danger of being sprung out of line, and consequently of being unequally turned,than with the lathes ordinarily employed for that purpose.

To enable others to understand the construction and operation of iny invention, I will proceed to describe it with reference tothe drawings.

A is a strong cast-iron bed or frame, which is sustained by suitable legs a, and which supports the working parts of the machine. B is a hollow or tubular spindle, which is situated upon the frame A near the center thereof, and which rotates in suitable bearings b.

Fitted upon one end of this hollow spindle B is a cutter-head, C, while near the center thereof is a large spur-wheehc. This spurwheel gears into a pinion, d, which is fixed upon a drivin g-shaft, c, situated longitudinally at one side of the frame A, as shown more clearly in Fig. 3, and which has a driving-pulley, c", fixed upon it.

f are horizontal bars, which are situated transversely between the legs a at opposite ends of the machine, and are furnished near their centers with bearings or journal-boxes, which support the longitudinal shaft g, which is placed underneath the frame A. Fixed on this shaft g is aband-wheel or pulley, 71 which is connected with the hollow spindle B above it by means of a belt i, as shown more plainly in Fig. l. Secured upon the same shaft, one at each side of the said pulley h, are two double pulleys, j and k, which actuate the feedingmechanism, as will be presently set forth.

Formed in the central part of the face of the cutter-head C is a circular recess, m, the outer annular portion of which is notched or recessed in such manner that shoulders u are formed thereon, the Hat, surfaces of the said shoulders n radiating from the axis of the head C, and having the roughing-cutters r sethe recess m, and in which a deep notch is formed in such manner that a shoulder, s, is formed upon the said flange, upon which is secured the smoothing-cutter u. This annular block A* is prevented from turning around within the spindle by means of a short pin, ctf which projects back from the iiange and lits into a suitable recess or notch behind it, as

shown in Fig. l. That part of the central,

hole or slot of the said annular block which is situated behind the smoothing-cutter n is made circular and of the same size as the finished shaft, so that it furnishes a steady bearing for the shaft while it is being turned.r as will be hereinafter further explained. Fixed in the opposite or rearmost end of the tubular spindle B is another annular block, the central hole of which is also circular and of the same size as the finished shaft, and which assists to steady and support the rearmost end of the said shaft while it'is being turned.

D and E represent two pairs of horizontal grooved feeding-rollers, of which one pair, D, is placed just in front of the head (l, while the other pair, E, is situated just in rear of the hollow spindle B, the two rollers of each pair being situated opposite each other, one upon each side of the axial line of the head C and spindle B, as more clearly represented in Fig. 3. Each of these rollers rotates upon a vertical pin or arbor, a, which projects up from a transverse sliding block, A, the said blocks being situated in transverse dovetail grooves B', formed in the upper surface of the frame A, and of which there is one to each pair ofthe said rollers, in such man ner that they may be moved in or out, to cause the rollers D or E, as the case nia-y be, to approach or recede from each other, to grasp or release the shaft to be turned. Each of these rollers D and E has a V-shaped groove, c, formed in its periphery, and theobject of the said rollers is to feed the shaft along to the cutters r and s and through the hollow spindle B, as will be presently fully set forth.

'w indicates pivoted blocks, the lower ends of which form vertical pivots, which are placed in suitable sockets or bearings formed in the upper surface of the frame A. One of these blocks wis situated at each side of the head C, and in like manner there is one of the same at each side of the rearmost end of the spindle B, as shown in These pivoted blocks fw have transverse cylindrical holes formed in their upper ends, which serve as bearin gs for the inner ends of short longitudinal shafts C', the outer ends of which work in bearings in similar blocks b, which are pivoted vertically in sliding or adjustable blocks c. The said adjustable blocks are placed in transverse grooves or recesses c', formed in the upper side of the frame A, near the ends thereof, so that they may be moved in or out and secured in any desired position by means of set-screws d' acting upon their sides.

On each of the shafts C is formed a tangent screw, j", which gears into the worm-wheel t of the adjacent roller D or E, as the case may be, when the said rollers are in operation, as will be presently further explained. Fixed on each of the shafts G is a small pulley, g', and these pulleys g are connected by belts h with the double pulleys j and lr, on the shaft g, as Shown in Figs. l and 2.

Formed longitudinally in the bottom of each of the dovetail grooves is an additional groove, n', and projecting down into this groove n', from the under side of each block A', is a lug or ear, m', in which a female screw is formed in a direction parallel with the said groove. Placed over and covering each end of each of the aforesaid dovetailed grooves is a fiat plate, s', in which are formed bearings for the ends of shafts a', which are placed in the grooves and pass through the female screws in the lugs m', and have a screw-thread formed at each end, as shown in dotted lilies in Fig. 3, the screw-threads upon such opposite ends of the shafts u running in opposite directions, so that when the shaft is turned in one direction, by means of acrank, u, attached to one of its ends, the screw-threads will bring the sliding blocks A apart, and consequently bring the feed-rollers D or E, as the case may be, apart or away from the shaft to be turned, while if turned in the opposite direction they will cause the said feed-rollers to approach each other, to act upon the said shaft to feed it to the cutters 'r and u and through the hollow spindle B, as will be presently fully explained.

A rotary motion being communicated to the driving-shaft c by means of its pulley c, the cutter-head C and tubular spindle B, together with the annular blocks Ai'G Bf, are revolved through the agency of the pinion d and spurwheel c, the belt i at the same time rotating the shaft g, which in turn revolves the shafts c', so that the tangent-screws j", acting on the worm-wheels t, slowly turn the grooved feedrollers D in the direction shown by the arrows in Fig. 3. The feed-rollers D being adjusted close together, the shaft to be turned, which is represented by E in the drawings, is thrust inward betweenthe said rollers D, the V-sh aped grooves of which firmly clasp the saine, so that the slow rotation of the said rollers feeds or pushes the shaft F inward between the revolving roughing cutters r, and then past the smoothing-cutter u, into and through the tubular or hollow spindle B, the roughing-cutters r cutting off the greater part of the surplus of metal therefrom, and brin gingitto a cylindrical form, and the cutter u smoothing the surface of the same. When the shaft F hasbeen fed inward far enough to bring its rearmost end between the feedrollers E, the rollers D are brought away from the front or forward end thereof by turning the shafts a by means of their at tached cranks a, which moves the blocks A of the rollers D outward in such manner as to bring the said rollers apart, as hereinbefore fully set forth, whereupon the rollers E draw the remaining length of the shaft F between the cutters, which act upon it in the same manner as when it is pushed between them by the rollers D, as just explained, the'shaft being supported and steadied against t-he pressure of the cutters while being turned by being closely sur: rounded by the annular blocks A* and'Bt, as more plainly represented in Fig. 1, any desired number of such shafts F being fed in succession through the tubular spindle B, and turned into cylindrical form, without any of the inconvenience or loss of time resulting from the necessity of centering the shafts or from their liability to be sprung out of line in turning them in the lathe commonly employed for this purpose. By turning the shafts a the feed-rollers may not only be brought away from or caused to grasp the shaft F, as just explained, but the said rollers may also be adj usted at any desired distance apart, as for turning shafts of different sizes, the blocks c being moved outward when the said rollers are brought away from each other, so that the tan gen t-screws yield to the outward movement of the rollers, while the tension of the belts h keep the said tanf gent-screws in contact, and, consequently, in gear with the worm-wheel t.

What I claim as new, and desire to secure by Letters Patent, is-

l. The annular block At, so applied, in combination with the tubular spindle B and cutter-head G, as to support and steady the shaft during the operation of turning1 the saine, substantially asherein lset forth.

2. The attachment of the smoothing-cutter fu to the annular block Ai, substantially as herein set fort-h, for the purpose specified.

3. The annular block Bit, fitted into the rearlnost end of' the tubular spindle B, and operating, in conjunction with the annular block Aly to steady and support the shaft While being turned, substantially as herein set forth.

4. The Combination of th hollowT spindle B, cutter-head G, and the two sets of grooved feedrollers D and E--one set for pushing and the J. J. CONLEY.

Witnesses:

A. LE CLERC, J. W. GooMBs. 

